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參數(shù)資料
型號(hào)： SI2494-A-FM
廠商： Silicon Laboratories Inc
文件頁(yè)數(shù)： 67/70頁(yè)
文件大?。?/td> 0K
描述： IC ISOMODEM 56KBPS 38-QFN
標(biāo)準(zhǔn)包裝： 364
系列： *
Si2494/39
Rev. 1.0
7
Table 4. Loop Characteristics
(VD = 3.0 to 3.6 V, TA = 0 to 70 °C for F-grade, TA = –40 to 85 °C for G-grade)
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
DC Termination Voltage
VTR
IL = 20 mA, ILIM1 =0
DCV = 00, MINI = 11, DCR = 0
——
6.0
V
DC Termination Voltage
VTR
IL = 120 mA, ILIM = 0
DCV = 00, MINI = 11, DCR = 0
9—
—
V
DC Termination Voltage
VTR
IL =20mA, ILIM =0
DCV = 11, MINI = 00, DCR = 0
——
7.5
V
DC Termination Voltage
VTR
IL = 120 mA, ILIM = 0
DCV = 11, MINI = 00, DCR = 0
9—
—
V
DC Termination Voltage
VTR
IL =20mA, ILIM =1
DCV = 11, MINI = 00, DCR = 0
——
7.5
V
DC Termination Voltage
VTR
IL =60mA, ILIM =1
DCV = 11, MINI = 00, DCR = 0
40
—
V
DC Termination Voltage
VTR
IL =50mA, ILIM =1
DCV = 11, MINI = 00, DCR = 0
——
40
V
On-Hook Leakage Current
ILK
VTR = –48 V
—
5
A
Operating Loop Current
ILP
MINI = 00, ILIM = 0
10
—
120
mA
Operating Loop Current
ILP
MINI = 00, ILIM = 1
10
—
60
mA
DC Ring Current
DC current flowing through ring
detection circuitry
—1.5
3
A
Ring Detect Voltage2
VRD
RT = 0
12
15
18
VRMS
Ring Detect Voltage2
VRD
RT = 1
18
21
25
VRMS
Ring Frequency
FR
15
—
68
Hz
Ringer Equivalence Number
REN
—
0.2
Notes:
1.
ILIM = U67, bit 9; DCV = U67, bits 3:2; MINI = U67, bits 13:12; DCR = U67, bit 7; RT = U67, bit 0.
2.
The ring signal is guaranteed to not be detected below the minimum. The ring signal is guaranteed to be detected
above the maximum.
Si3018
TIP
RING
10 F
600
IL
VTR
+
–
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